A man was killed Friday when the tractor he was driving rolled and landed on him after it was struck from behind.

Killed was:Samuel R. Ames, 19, Altamont.

Ames was driving the slow-moving tractor west on U-40 when a Jeep slammed into it about 9:45 p.m., said Utah Highway Patrol Trooper Jack Peterson. Ames sustained fatal injuries when the tractor landed on him. He died at the scene.

The driver of the Jeep, Kimberly Foote, 20, Vernal, didn't see the tractor's rear reflector until it was too late, investigators said. When she noticed the tractor, she tried to swerve out of the way and struck the machine's right tire.

The Jeep landed on its side after impact. Paramedics took Foote to the Uintah Basin Medical Center, where she was treated and released. Her 8-month-old daughter was secure in a safety seat and wasn't injured.

Troopers did not cite Foote because there was no excessive speed involved and because Utah law doesn't require tractors to be "street worthy," Peterson said.

Ames and his father had just finished baling hay and had planned to stop about a mile away from the accident site to load the tractor onto a flatbed truck.